Motor attachment for sewing-machines.



No. 862,652. PATENTED AUG. 6, 1907 J. Y. PARCE. MOTOR ATTACHMENT FORSEWING MACHINES.

APPLICATION FILED JUNE 1, 1906.

WI TNESSES:

A TTORNE Y.

ing a modified manner of supporting the motor and the 5a verticalsection through the base 22 and showing ortu re in the opposite parallelside I5 and is opcr'ativoly JOSEPH Y. PAROE, 0

DENVER, COLOR-ADO.

MOTOR ATTACNT FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed June 1,1906- selial 319,733.

To all whom it may concern:

lie it known that I, ,losnnu Y. Panes, a citizen of the U nitcd Statesof Amerir 1-, residing at Denver, in the county of Denver and State ofColorado, have inventcd certain new and useful Improvements in MotorAttach merits-for Sowing-lllachines, of which the following is aspecification.

My invention relates to a motor attachment for sewing machines andkindred apparatus and has for its object to provide means by which amotor may be mounted in proximity to a machine of the class named in amanner to insure constant contact of a spherical disk connected with itsarmature, with the driven wheel of the machine, and so as to permit itsbeing readily removed to clear the table upon which it is mounted.

My construction furthermore provides means within reach of the operatorto vary the velocity of the machine, by changing the position of thedriving disk in relation to the driven wheel, to alter the position ofthe motor relative to the machine mounted upon the table to which it isattached, and to operate a switch arranged to actuate the motor byconnecting its Iield with a suitable source of electricity. I g I Iattain these objects by the mechanism illustrated in the accompanyingdrawings, in the various views of which like parts are similarlydesignated and in which,

Figure 1shows a fragmentary plan view of a-sewing machine and the tableupon which it is mounted, with my device in operative position, Fig, 2aside elevation thereof, Fig. 3an enlarged section taken along a line3-3, Fig. 2, Fig. 1--a vertical section through the motor-supportingframe, along a line 4 -4, Fig. 3, Fig.

the table 8 and arm 20 in section, Figs. 6 and 7-fnespcctively ahorizontal and a vertical section illustratelcctric switch and Figs. 8and 9respective1y a front and a side elevation of a modifiedconstruction for attaching the apparatus to the sewing machine table.

Referring to the drawings, 6 represents the sewing rnaclrine carryingthe driven wheel 7 and mounted upon the table 8. v

9 is the preferably verticallyinclined electric motor which may be ofany suitable variety and whose arma ture is connected with a drivingdisklO, the face of which is of spherical form and which, if so desired,may be covered with any suitable friction producing substance.v Motor 9is rigidly secured upon a vertically disposedparallelogrammic-supporting frame 11, two opposits sides 14 and 15 ofwhich are substantially perpendicular when the device is mounted andrespec-. tively support the electric switch 12 and'the operating rod 13.The former is secured to the sides 14 within the frame 1 I, while therod projects through a bearing ap- .conrn. cted with the reversiblecontact blade. to of the 1 switch. The opposite extremity of rod 13,which in practice, extends within easy reach of the operai or of themachine, is provided with a suitable handle 17.

To render the ripper portion of the frame resilient .and thereby furtherinsure the frictional contact between the wheel 7 and the disk 10, theupright side 15 and the in practice slanting upper side 18 of frame 11may be disconnected by omission of the adjacent corner poles of switch12 with a suitable source of electricity,

such asan incandescent lamp socket.

A washer 26 made of fiber or other non-conducting substance. isinterposed between the switch and the adjacent side of frame 11 forinsulating purposes.

In the construction illustrated inFigs. 6 and 7, a

standard 26 is substituted for frame 11' and the electric switch securedthereto by means of a stirrup 27. Figs. 8 and 9 illustrate a modifiedmannerof connecting arm 20 with the table. A bracket 28 secured to theside of the table, takes the place of base 22 and the slanting arm ispivotally secured to its upper extremity which 1 preferably extendsabove the top of the table. This construction particularly adapts themotor for use on machines of the cabinet type in which the entire dockof the table is displaced to bring the machine in operative position. v

' Having thus described the mechanical construction of the device, itsoperation will be readily understood. The motor being mounted upon base22 through instrumentalit'y of frame 11 and arm 20, occupies a vertically inclined position, thcdisk 10 being normally in engagement withthe peripheral surface of the driven wheel 7 of the machine. Itselevation relative to the machine is such that its horizontal axis,prolonged, will extend through the center of the wheel 7. When thecenter of disk 1O is in engagementwith the driven I wheel, no motionwill be imparted thereto even-while the motor is-operat'ing, 'but whenthe latter is turned around its pivot 19 by means of the operatinghandle 17, the movement of the armature is, communicated to vwheel 7through instrume'ntality of disk 10, which re- -mains constantly inengagementtherewith by reason of the spherical form of its face which isdescribed frorna center coincident with the intersection of the.horizontal and vertical axes of the motor, tho'latterof which passes, ifextended, through the pivot 19 and may be parallel with the inclinedpivot screw 21 on a base 22. The inclined position of pivots l9 and 21in cooperation rro with the specific gravity of the motor as well as theresiliency of frame 11, insures constant frictional contact .of't-hedisk with the wheel. By turning the operating handle around itslongitudinal axis, the circuit of elec- 5 tricity wliich energizes themotor may be closed or opened at will, while when the services oftheinotor are not employed, it may readily be removed from contact withthe machine and out of the way of the operator, thus clearing the tablefor other purposes as illus- 10 trated in broken lin'es in Fig. 1. Thisfeature of my :device bcsides affording the :advantagesnamed, permit'sitsluseon so-c'alled drop head machines.

Having thus described my invention what I claim g '1. in comliinationwith a suitable supporting base and rotatable driven wheel, an arinpivotaliycarrled upon said base to onejside of the plane of rotation ofsaid driven wheel and lmving au inclined'axis of rotation, a motor car-'i'ied upon. the free end of said arm, a driving disk carried by tiiemotor and adapted for contact with said driven wheel, said arm extendingfrom its pivot point towards the "fplane of the wheel whereby thcdriving disk-will be held '--'agninst the driven wheel by the force ofgravity acting on the motor, substantially as described.

2. in combination with a suitable supporting base and rotatable drivenwheel, an arm pivotaliy carried upon said base to one side of the planeof rotation of said driven' wheel and-having an inclined axis ofrotation. a motor piv- 3. In combination with a suitable supporting baseand 35 rotatable driven wheel, an arm pivotaiiy carried upon said baseto one side of the plane of rotation of said driven wheel and having aninclined axis in: rotation, at flexible frame mounted upon the free endof the-arm, a motor carried by said flexible frame, a driving diskcarried by the 40 motor audiadapted for contact with said driven wheel;said arm extending from its pivoted point towards the plane of thewhc'ci whereby the driving disk will be held against the driven wheel bythe force of gravity acting on the motor substantially as described.-'45 In testimony wherein? I have aiilxed my signature in presence oftwo witnesses. I p I JOSEPH 1'. PARCE. Witnesses: i

G. .i. RoLLANnn'r. K. M. Bron-r.

